Read a DNS message envelope
01A DNS header carries transaction and control fields plus counts for four following sections.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 4.1.1 ↗
RFC 1035 · § 4.1.1EXAMPLE
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03
Use each count to locate the following record sections.
Use each count to locate the following record sections.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
Question, Answer, Authority, and Additional are distinct sections.
- Question, Answer, Authority, and Additional are distinct sections.
- The ID helps correlate a response with its query; it is not cryptographic authentication.
The drawing is a simplified worked example. Follow the linked RFC and its updates for implementation requirements.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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